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Codeforces Round 946 (Div. 3)
01:37:41
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graphs
combine-tags-by-or
*combine tags by OR
2-sat
binary search
bitmasks
brute force
chinese remainder theorem
combinatorics
constructive algorithms
data structures
dfs and similar
divide and conquer
dp
dsu
expression parsing
fft
flows
games
geometry
graph matchings
graphs
greedy
hashing
implementation
interactive
math
matrices
meet-in-the-middle
number theory
probabilities
schedules
shortest paths
sortings
string suffix structures
strings
ternary search
trees
two pointers
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Problems
#
Name
796D
Police Stations
constructive algorithms
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
2100
x5143
1176D
Recover it!
dfs and similar
,
graphs
,
greedy
,
number theory
,
sortings
1800
x5138
1367E
Necklace Assembly
brute force
,
dfs and similar
,
dp
,
graphs
,
greedy
,
number theory
1900
x5136
1210A
Anadi and Domino
brute force
,
graphs
1700
x5120
1513D
GCD and MST
constructive algorithms
,
dsu
,
graphs
,
greedy
,
number theory
,
sortings
2000
x5061
404C
Restore Graph
dfs and similar
,
graphs
,
sortings
1800
x5011
1613E
Crazy Robot
dfs and similar
,
graphs
2000
x5000
1843F1
Omsk Metro (simple version)
data structures
,
dfs and similar
,
dp
,
graphs
,
greedy
,
math
,
trees
1800
x4999
916C
Jamie and Interesting Graph
constructive algorithms
,
graphs
,
shortest paths
1600
x4998
1228D
Complete Tripartite
brute force
,
constructive algorithms
,
graphs
,
hashing
,
implementation
1900
x4975
615B
Longtail Hedgehog
dp
,
graphs
1600
x4970
1439A2
Binary Table (Hard Version)
constructive algorithms
,
graphs
,
greedy
,
implementation
1900
x4959
107A
Dorm Water Supply
dfs and similar
,
graphs
1400
x4956
1217D
Coloring Edges
constructive algorithms
,
dfs and similar
,
graphs
2100
x4952
1485D
Multiples and Power Differences
constructive algorithms
,
graphs
,
math
,
number theory
2200
x4947
1715D
2+ doors
2-sat
,
bitmasks
,
graphs
,
greedy
1900
x4937
1076D
Edge Deletion
graphs
,
greedy
,
shortest paths
1800
x4911
1739D
Reset K Edges
binary search
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1900
x4893
34D
Road Map
dfs and similar
,
graphs
1600
x4865
776D
The Door Problem
2-sat
,
dfs and similar
,
dsu
,
graphs
2000
x4847
1651D
Nearest Excluded Points
binary search
,
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x4842
1343E
Weights Distributing
brute force
,
graphs
,
greedy
,
shortest paths
,
sortings
2100
x4819
1601B
Frog Traveler
data structures
,
dfs and similar
,
dp
,
graphs
,
shortest paths
,
two pointers
1900
x4788
24A
Ring road
graphs
1400
x4788
1276B
Two Fairs
combinatorics
,
dfs and similar
,
dsu
,
graphs
1900
x4674
1407D
Discrete Centrifugal Jumps
data structures
,
dp
,
graphs
2200
x4635
417C
Football
constructive algorithms
,
graphs
,
implementation
1400
x4609
1679D
Toss a Coin to Your Graph...
binary search
,
dfs and similar
,
dp
,
graphs
1900
x4583
1579F
Array Stabilization (AND version)
brute force
,
graphs
,
math
,
number theory
,
shortest paths
1700
x4574
29C
Mail Stamps
data structures
,
dfs and similar
,
graphs
,
implementation
1700
x4573
1183E
Subsequences (easy version)
dp
,
graphs
,
implementation
,
shortest paths
2000
x4530
131D
Subway
dfs and similar
,
graphs
1600
x4514
94B
Friends
graphs
,
implementation
,
math
1300
x4507
11D
A Simple Task
bitmasks
,
dp
,
graphs
2200
x4481
229B
Planets
binary search
,
data structures
,
graphs
,
shortest paths
1700
x4471
739B
Alyona and a tree
binary search
,
data structures
,
dfs and similar
,
graphs
,
trees
1900
x4432
28B
pSort
dfs and similar
,
dsu
,
graphs
1600
x4424
1472G
Moving to the Capital
dfs and similar
,
dp
,
graphs
,
shortest paths
2100
x4417
1481D
AB Graph
brute force
,
constructive algorithms
,
graphs
,
greedy
,
implementation
2000
x4402
545E
Paths and Trees
graphs
,
greedy
,
shortest paths
2000
x4400
1286B
Numbers on Tree
constructive algorithms
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
trees
1800
x4389
1487E
Cheap Dinner
brute force
,
data structures
,
graphs
,
greedy
,
implementation
,
sortings
,
two pointers
2000
x4379
711D
Directed Roads
combinatorics
,
dfs and similar
,
graphs
,
math
1900
x4365
1574D
The Strongest Build
binary search
,
brute force
,
data structures
,
dfs and similar
,
graphs
,
greedy
,
hashing
,
implementation
2000
x4363
623A
Graph and String
constructive algorithms
,
graphs
1800
x4362
793B
Igor and his way to work
dfs and similar
,
graphs
,
implementation
,
shortest paths
1600
x4345
14D
Two Paths
dfs and similar
,
dp
,
graphs
,
shortest paths
,
trees
,
two pointers
1900
x4320
802J
Send the Fool Further! (easy)
dfs and similar
,
graphs
,
trees
1400
x4302
743D
Chloe and pleasant prizes
dfs and similar
,
dp
,
graphs
,
trees
1800
x4253
1349C
Orac and Game of Life
dfs and similar
,
graphs
,
implementation
,
shortest paths
2000
x4239
1852B
Imbalanced Arrays
constructive algorithms
,
graphs
,
greedy
,
math
,
sortings
,
two pointers
1800
x4163
1433G
Reducing Delivery Cost
brute force
,
graphs
,
shortest paths
2100
x4132
1516D
Cut
binary search
,
data structures
,
dp
,
graphs
,
number theory
,
two pointers
2100
x4104
1857G
Counting Graphs
combinatorics
,
divide and conquer
,
dsu
,
graphs
,
greedy
,
sortings
,
trees
2000
x4100
8B
Obsession with Robots
constructive algorithms
,
graphs
,
implementation
1400
x4080
1846G
Rudolf and CodeVid-23
bitmasks
,
dp
,
graphs
,
greedy
,
shortest paths
1900
x4069
1364D
Ehab's Last Corollary
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
trees
2100
x4018
1105D
Kilani and the Game
dfs and similar
,
graphs
,
implementation
,
shortest paths
1900
x3996
767C
Garland
dfs and similar
,
graphs
,
greedy
,
trees
2000
x3984
150B
Quantity of Strings
combinatorics
,
dfs and similar
,
graphs
,
math
1600
x3971
1000E
We Need More Bosses
dfs and similar
,
graphs
,
trees
2100
x3963
877D
Olya and Energy Drinks
data structures
,
dfs and similar
,
graphs
,
shortest paths
2100
x3954
558C
Amr and Chemistry
brute force
,
graphs
,
greedy
,
math
,
shortest paths
1900
x3936
1842D
Tenzing and His Animal Friends
constructive algorithms
,
graphs
,
greedy
1900
x3923
1468J
Road Reform
dsu
,
graphs
,
greedy
1800
x3921
1081D
Maximum Distance
dsu
,
graphs
,
shortest paths
,
sortings
1800
x3898
1817B
Fish Graph
brute force
,
constructive algorithms
,
dfs and similar
,
graphs
1900
x3879
1062D
Fun with Integers
dfs and similar
,
graphs
,
implementation
,
math
1800
x3869
193A
Cutting Figure
constructive algorithms
,
graphs
,
trees
1700
x3852
543B
Destroying Roads
constructive algorithms
,
graphs
,
shortest paths
2100
x3836
1927F
Microcycle
data structures
,
dfs and similar
,
dsu
,
graphs
,
greedy
,
implementation
,
sortings
,
trees
1900
x3835
1301D
Time to Run
constructive algorithms
,
graphs
,
implementation
2000
x3811
144D
Missile Silos
data structures
,
dfs and similar
,
graphs
,
shortest paths
1900
x3797
700B
Connecting Universities
dfs and similar
,
dp
,
graphs
,
trees
1800
x3787
990D
Graph And Its Complement
constructive algorithms
,
graphs
,
implementation
1700
x3759
1278D
Segment Tree
data structures
,
dsu
,
graphs
,
trees
2100
x3732
989C
A Mist of Florescence
constructive algorithms
,
graphs
1800
x3714
1333D
Challenges in school №41
brute force
,
constructive algorithms
,
games
,
graphs
,
greedy
,
implementation
,
sortings
2100
x3690
1770D
Koxia and Game
constructive algorithms
,
data structures
,
dfs and similar
,
dsu
,
flows
,
games
,
graph matchings
,
graphs
,
implementation
2000
x3680
1012B
Chemical table
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
matrices
1900
x3657
832D
Misha, Grisha and Underground
dfs and similar
,
graphs
,
trees
1900
x3619
283B
Cow Program
dfs and similar
,
dp
,
graphs
1700
x3610
690C2
Brain Network (medium)
dfs and similar
,
graphs
,
trees
1500
x3585
1470D
Strange Housing
constructive algorithms
,
dfs and similar
,
graph matchings
,
graphs
,
greedy
2200
x3582
1950G
Shuffling Songs
bitmasks
,
dfs and similar
,
dp
,
graphs
,
hashing
,
implementation
,
strings
1900
x3560
1726D
Edge Split
brute force
,
constructive algorithms
,
dfs and similar
,
dsu
,
graphs
,
probabilities
,
trees
2000
x3556
1082D
Maximum Diameter Graph
constructive algorithms
,
graphs
,
implementation
1800
x3547
114B
PFAST Inc.
bitmasks
,
brute force
,
graphs
1500
x3540
1146C
Tree Diameter
bitmasks
,
graphs
,
interactive
1700
x3525
1041E
Tree Reconstruction
constructive algorithms
,
data structures
,
graphs
,
greedy
1900
x3518
1520G
To Go Or Not To Go?
brute force
,
dfs and similar
,
graphs
,
greedy
,
implementation
,
shortest paths
2200
x3513
917B
MADMAX
dfs and similar
,
dp
,
games
,
graphs
1700
x3492
1687B
Railway System
constructive algorithms
,
graphs
,
greedy
,
interactive
,
sortings
1700
x3491
546E
Soldier and Traveling
flows
,
graphs
,
math
2100
x3488
585B
Phillip and Trains
dfs and similar
,
graphs
,
shortest paths
1700
x3487
842C
Ilya And The Tree
dfs and similar
,
graphs
,
math
,
number theory
,
trees
2000
x3418
1677C
Tokitsukaze and Two Colorful Tapes
constructive algorithms
,
dfs and similar
,
graphs
,
greedy
1900
x3415
1266D
Decreasing Debts
constructive algorithms
,
data structures
,
graphs
,
greedy
,
implementation
,
math
,
two pointers
2000
x3411
1198C
Matching vs Independent Set
constructive algorithms
,
graphs
,
greedy
,
sortings
2000
x3408
605B
Lazy Student
constructive algorithms
,
data structures
,
graphs
1700
x3389
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